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One-way wrench having a catching device with two catches and a catch holder and having differential teeth

a technology of catching device and wrench, which is applied in the field of wrench catching device, can solve the problems of wrenches not working in driving operation environment, wrenches are also likely to get damaged, and wrenches are not easy to operate in a driving operation environment, so as to reduce the cost of processing the wrench body and manufacturing and maintaining the catching device. the effect of reducing the cost of catching device and simplifying the wrench body structur

Active Publication Date: 2017-09-12
INFAR IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006]The present invention provides a one-way wrench having a catching device with two catches and a catch holder and having differential teeth to simplify a wrench body structure and effectuate the following features and advantages: two catches are disposed in the same catching chamber; starting ends of tooth portions are dentate to different extents; the catch holder hold two position-restoring elements for catching the two catches; hence, costs incurred in processing the wrench body as well as manufacturing and maintaining the catching device are reduced; and thus the objectives of stable driving as well as quick installation are achieved.

Problems solved by technology

That is to say, in the situation where the driving element has more than 72 ratchet teeth, each of the ratchet teeth is overly small; as a result, not only are the ratchet teeth incapable of transmitting a driving force exerted thereon, but the ratchet teeth are also likely to get damaged.
Due to the aforesaid limitation, the wrench fails to work in a driving operation environment where the tooth-changing angle is less than 5°.
However, the aforesaid structure necessitates the two catching chambers 12 and thus renders its operation intricate.

Method used

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  • One-way wrench having a catching device with two catches and a catch holder and having differential teeth
  • One-way wrench having a catching device with two catches and a catch holder and having differential teeth
  • One-way wrench having a catching device with two catches and a catch holder and having differential teeth

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Embodiment Construction

[0021]A preferred embodiment of a one-way wrench structure of the present invention is illustrated with FIGS. 1 through 4 and described below.

[0022]The wrench has a body 10, a driving element 20, and a catching device A disposed in the body 10. The catching device A has two catches 30, 30′, two position-restoring elements 40, and a catch holder 50. One end of the body 10 has a driving hole 11. A catching chamber 12 is laterally disposed beside the driving hole 11 and is in communication with the driving hole 11. The catching chamber 12 is shallow at its two ends and deep at its middle. The driving element 20 is externally provided with ratchet teeth 21 and internally provided with a penetrated driving hole 22 for driving a workpiece to rotate along with the wrench. The present invention has an essential technical feature, that is, one catching chamber 12 contains the catching device A which has two catches 30, 30′, two position-restoring elements 40, and one catch holder 50.

[0023]Th...

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Abstract

A one-way wrench having a catching device with two catches and a catch holder and having differential teeth is provided and characterized in that: the catching device is disposed in a catching chamber laterally disposed beside a driving hole of the one-way wrench; the catching device has two catches, two position-restoring elements, and a catch holder; the catch holder pushes the two catches simultaneously, such that a single stable base structure pushes the two catches simultaneously; and starting ends of tooth portions of the two catches are dentate to different extents, so as to effectuate a small transmission-oriented tooth-changing angle, achieve stable control, as well as cut production and maintenance costs.

Description

BACKGROUND OF THE INVENTION[0001]Technical Field[0002]The present invention relates to a wrench catching device driven in a single direction, characterized in that the catching device has two catches operating in the same direction.[0003]Description of Related Art[0004]Wrenching tools nowadays are sophisticated. Among them, a one-way wrench structure is simple and durable, as its structure is characterized mostly in that: a driving element for use with a ratchet wheel is disposed in a driving hole; and the driving element is externally provided with ratchet teeth operating in conjunction with a catching device. However, the number of ratchet teeth is subjected to a strength-related limit, i.e., a maximum of 72. That is to say, in the situation where the driving element has more than 72 ratchet teeth, each of the ratchet teeth is overly small; as a result, not only are the ratchet teeth incapable of transmitting a driving force exerted thereon, but the ratchet teeth are also likely t...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): B25B13/46B25B13/04
CPCB25B13/463B25B13/04
Inventor CHEN, ANDER
Owner INFAR IND CO LTD
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